Dear Skleutz,

Rule one in piston rings arrangement : the gaps never alligned with the "centerline" of the engine ( 6 o'clock - 12 o'clock ). Rule two : gaps never
positioned perpendicular to the centerline ( 3 o'clock or 9 o'clock ).
You should also take into account that there is one side of the piston suffering more wear caused by the "cantling" due to the force of the explosion...
Hope this will help you ,

Danny